Grinding machine



1,528,993 E. A. SAMUEL GRINDING MACHINE March 10, 1925.

Filed Jan. 12. 1924 Patented Mar. 10, 1925 UNITED STATES- 1,528,993PATENT OFFICE.

EMIL A. SAMUEL, OFv DETROIT, MICHIGAN, ASSIGNQR TO L. A. YOUNGINDUSTRIES, INC., OF DETROIT, MICHIGAN.

GRINDING MACHINE.

Application filed January 12, 1924. Serial No. 685,770.

is of large capacity, may be readily set up for springs of differentdiameters and one in which the work is very securely held.

Further objects and objects relating to structural details, willdefinitely appear from the detailed description to follow.-

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearlyillustrated in the accompanying drawing, forming a part of thisinvention, in which:

Fig. I is a fragmentary front perspective view of a grinding machineembodying the features of my invention, the work holder being inretracted position.

Fig. II is a fragmentary side elevation of the .work holder.

Fig. III is a detail section on a line corresponding to line 33 of Figs.I and II.

In the drawing similar reference characters refer to similar partsthroughout the several views, and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

Referring to the drawings, 1 represents the bed of the machine and 2 thegrinding discs which are supported in spaced relation so that the workmay be introduced between them.- As the structural details of theseparts and the driving means for the discs form no part of thisinvention, they will not be further described herein.

At the front of the machine I mount a rock shaft 3 carrying an arm a onwhich the work holder is mounted. This work holder comprises a crosshead 5 pivoted at 6 on the arm and provided with a disc 7 having holes 8therein which may be engaged by the locking pin 9 to hold the cross headin its adjusted position. This locking pin is provided with a hand lever10 and is held in engaging position by the spring 11.

At each end of the cross head 5 is a pair of pocket frames12, thesepocket frames being of rectangular form and disposed in an outwardlydiverging relation, the frames being open to each other at their innerends. The frames are open at both sides and receive a plurality oftubular pockets 13, these pockets being short sections of tubes ofproper diameter to receive the springs which are to be ground. Thepockets are changed the machine is to be adapted for springs ofdifferent diameters, as the springs should be a fairly good fit in thepockets, that is, while the diameters should be such as to permit readyremoval or insertion of the springs, they should also be well supportedby the pockets.

The pockets are clamped in position by the clamping bars 14 disposed inoutwardly diverging relation and clamped upon the pockets by means ofthe wedges 15. These wedges have threaded shanks 16 disposedlongitudinally of the cross head 5 and ad justably supported by means ofthe nuts 17. When the wedges are forced outwardly by these nuts, theclamping bars are clamped against the pockets. The wedges preferablyengage grooves 18 in the inner sides of the clamping bars, therebyserving as an eifective means for retaining the clamping bars.

In practice, one of the pockets at one end of the work holder ispresented tothe grinding disc by rocking the rock shaft 3. The pocketsat the other end of the holder may be filled during the grindingoperation.

The machine is of large capacity and the work is effectively held, thepockets being readily clamped up so that they are effectively retainedin the holders and without the necessity for care in adjusting while thepockets are assembled therein.

I-Iaving thusdescribed my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a grinding machine, the combination of a pair of spaced grindingdiscs, a rock shaft, an arm on said rock shaft, a work holder comprisinga cross head pivotally mounted on said arm and provided at its ends withpairs of open sided work pocket frames of rectangular form disposed inoutwardly diverging relation and open to each other at their inner ends,tubular open ended pockets arranged in said pocket frames, pocketclamping bars arranged at the inner ends of said pocket frames andhaving longitudinal grooves on their inner faces, clam'p ing wedgesengaging said grooves of said clamping bars, said clamping wedges beingprovided with threaded shanks disposed longitudinally of said cross headand with adjusting nuts engaging the ends thereof, and means forsecuring said cross head in its adjusted positions whereby either endmay be presented to said grinding discs.

In a grinding machine, the combination of a pair of spaced grindingdiscs, a rock shaft, an arm on said rock shaft, a work holder cross headpivotally mounted on said arm and provided at its ends with pairs ofopen sided work pocket frames ofrectangus lar form disposed in outwardlydiverging relation and open to each other at their inner ends, tubularopen ended pockets arranged in said pocket frames, pocket clamping barsarranged at the innerends of said pocket frames, clamping wedgesdisposed between said clamping bars, means for adjusting said clampingwedges, and means for securing said cross head in its adjusted positionswhereby either end may be pre sented to said grinding discs.

3. A work holder for grinding machines comprising a pivotally mountedcross head provided at its ends with pairs of open sided pocket framesof rectangular form disposed in outwardly diverging relation, said 1'ames being open to each other at their inner ends, tubular pocketsarranged in said pocket frames, pairs of pocket clamping membersarranged at the inner ends of said frames in outwardly convergingrelation, and clamping wedges disposed between said pairs of clampingmembers to coact therewith, said clamping wedges being provided withthreaded shanks disposed longitudinally of said cross head and withnutsengaging the ends thereof whereby the wedges may be adjusted toclamp said clamping members. against the pockets arranged in saidframes.

4. A work holder for grinding machines comprising a pivotally mountedcross head provided at its ends with pairs of open sided pocket framesof rectangular form disposed in outwardly diverging relation, saidframes being open to each other at their inner ends,

tubular pockets arranged in said pocket frames, pairs of pocket clampingmembers arranged at the inner ends of said frames in outwardlyconverging relation, and clamping wedges disposed between said pairs ofclamping members to coact therewith.

. 5. A work holder for grinding machines comprising a pivotally mountedcross head provided at its ends with pairs of open sided pocket framesdisposed in opposed relation, said frames being open to each other attheir inner ends, tubularpockets arranged in said pocket frames, pairsof pocket clamping members arranged at the inner ends of said frames,and clamping wedges disposed between said pairs of clamping members tocoact therewith, said clamping wedges being provided with threadedshanks disposed longitudinally of said cross head and with nuts engagingthe ends thereof whereby the wedges may be adjusted to clamp saidclamping members againstthe pockets arranged in said frames.

6. A work holder for grinding machines comprising a pivotally mountedcross head provided at its ends with pairs of open sided pocket framesdisposed in opposed relation, said frames being open to each other attheir inner ends, tubular pockets arranged in said pocket frames, pairsof pocket clamping members arranged at the inner ends of said frames,and clamping wedges disposed between said pairs of clamping members tocoact therewith.

7. A work holder for grinding machines comprising a pair of pocketframes of rectangular form disposed in outwardly diverging relation,said frames being open to each other at their inner ends, tubularpockets arranged in said. pocket frames, pocket clamping membersarranged at the inner ends of said frames in out 'ardly convergingrelation, and clamping wedges disposed between said pairs of clampingmembers to coact therewith.

8. A work holder for grinding machines comprising a pair of pocketframes disposed in opposed relation, said frames being open to eachother at their inner ends, tubular pockets arranged in said pocketframes, pocket clamping members arranged at the inner ends of saidframes, and clamping wedges disposed between said pairs of clampingmembers to coact therewith.

In witness whereof, I have hereunto my hand.

set

EMIL A. SAMUEL. [1,. s]

